Hadith #306 (Sunan Ibn Majah)
Book: The Book of Purification and its Sunnah
Narrator(s): Ali ibn Abi Talib, Bahr bin Kaniz - al-Saqqa' بحر بن كنيز أبو الفضل السقاء, Muhammad bin 'Abdul 'Aziz bin al-Wasti محمد بن عبد العزيز العمري الرملي بن الوا, Muslim bin Ibrahim al-Azdy مسلم بن إبراهيم الأزدي الفراهيدي, Sa'id bin Jubayr سعيد بن جبير الأسدي, Uthman bin 'Amr bin Saj عثمان بن عمرو بن ساج

“I heard Ibn ‘Abbas saying that a man was injured in the head at the time of the Messenger of Allah, then he had a wet dream. He was told to have a bath, so he took the bath, became rigid and stiff, and died. News of that reached the Messenger of Allah and he said: ‘They have killed him, may Allah kill them! Is not the cure for a lack of knowledge to ask questions?'”‘Ata’ said: “We heard that the Messenger of Allah said: ‘If only he had washed his body and left his head alone where the wound was.'”

Source: https://parallelquran.com/hadith/sunan-ibn-majah-306/